Th DragonFly BSD team has released DragonFly BSD 2.2. The biggest improvement in this release is that the HAMMER filesystem is considered production ready, but there is a whole boatload of other improvements as well.

Version 2.2 comes in either a bare-bone CD iso, a fully-featured DVD iso with a configured X environment, or a small, 512MB bootable image for use on a USB stick. The release notes detail all the other improvements. Be sure to download the release from one of the mirrors to distribute the load.